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Artist's impression of a sunset from the super-Earth Gliese 667 Cc. The brightest star in the sky is the red dwarf Gliese 667 C, which is part of a triple star system. | ESO/L. Calçada
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Billions of Habitable Worlds in Our Galaxy?

Could there really be billions of habitable worlds in our galaxy? Learn whether there could really be billions of habitable worlds in our galaxy.

March 28, 2012
3:00 AM EDT

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